JPH0560190B2 - - Google Patents
Info
- Publication number
- JPH0560190B2 JPH0560190B2 JP59100995A JP10099584A JPH0560190B2 JP H0560190 B2 JPH0560190 B2 JP H0560190B2 JP 59100995 A JP59100995 A JP 59100995A JP 10099584 A JP10099584 A JP 10099584A JP H0560190 B2 JPH0560190 B2 JP H0560190B2
- Authority
- JP
- Japan
- Prior art keywords
- access
- data
- songs
- position data
- absolute position
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
Classifications
-
- G—PHYSICS
- G11—INFORMATION STORAGE
- G11B—INFORMATION STORAGE BASED ON RELATIVE MOVEMENT BETWEEN RECORD CARRIER AND TRANSDUCER
- G11B27/00—Editing; Indexing; Addressing; Timing or synchronising; Monitoring; Measuring tape travel
- G11B27/10—Indexing; Addressing; Timing or synchronising; Measuring tape travel
- G11B27/102—Programmed access in sequence to addressed parts of tracks of operating record carriers
- G11B27/105—Programmed access in sequence to addressed parts of tracks of operating record carriers of operating discs
Landscapes
- Indexing, Searching, Synchronizing, And The Amount Of Synchronization Travel Of Record Carriers (AREA)
Description
【発明の詳細な説明】
産業上の利用分野
本発明は光学式デイスクプレーヤのアクセス方
法、特にヘツドをデイスクの曲間へアクセスする
ためのアクセス方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION Field of the Invention The present invention relates to an access method for an optical disc player, and more particularly to an access method for accessing a head between tracks on a disc.
従来例の構成とその問題点
近年、光学式デイスクを使用するコンパクトデ
イスクプレーヤは次第に普及しつつあり、そのた
めセツトとしてコストダウンも必要となつてき
た。Conventional configurations and their problems In recent years, compact disc players using optical discs have become increasingly popular, and as a result, it has become necessary to reduce the cost of the set.
以下に従来のコンパクトデイスクプレーヤの曲
間アクセス方法について説明する。まず、コンパ
クトデイスクのTOC領域に記録してある全曲の
曲間の絶対位置データ（TOCデータ）をすべて
専用の記憶装置に記憶し、その記憶装置からの
TOCデータを基準にして現在位置と比較し、ア
クセスすべき目的位置に対してその方向とそのア
クセス量を定めてアクセスする。すなわち、現在
位置の絶対量をコンパクトデイスクから読み取
り、一方、目的の曲間位置の絶対量をあらかじめ
記憶した記憶装置から取り出し、前記の両方の値
を比較することにより、両者の差の絶対値がアク
セス量であり、その計算結果の符号がアクセス方
向を示す。 A method of accessing between songs in a conventional compact disc player will be explained below. First, all the absolute position data (TOC data) between songs of all the songs recorded in the TOC area of the compact disc is stored in a dedicated storage device, and then the data from that storage device is stored.
The TOC data is compared with the current location, and the direction and amount of access to the target location are determined and accessed. That is, by reading the absolute value of the current position from the compact disk, and on the other hand, retrieving the absolute value of the desired inter-track position from the storage device that has been stored in advance, and comparing both of the above values, the absolute value of the difference between the two can be determined. This is the access amount, and the sign of the calculation result indicates the access direction.
しかしながら、上記のような方式ではTOCデ
ータを記憶しておくための専用の記憶装置が必要
となる。コンパクトデイスクには最大99曲録音さ
れているから、このTOCデータ全てを記憶しよ
うとすれば、１つのTOCデータは16ビツト構成
であるので、全部で最大16×99ビツトの容量の記
憶装置が必要となり、この記憶装置はセツト全体
としてコストアツプを招くという欠点を有してい
た。 However, the above method requires a dedicated storage device for storing TOC data. Up to 99 songs can be recorded on a compact disk, so if you want to store all of this TOC data, you will need a storage device with a total capacity of 16 x 99 bits, as one TOC data consists of 16 bits. Therefore, this storage device had the disadvantage of increasing the cost of the entire set.
発明の目的
本発明は上記従来の問題点を解消するもので、
TOCデータを記憶しておく記憶装置なしで曲間
にアクセスすることができるアクセス方法を提供
することを目的とする。Purpose of the invention The present invention solves the above-mentioned conventional problems.
The purpose of the present invention is to provide an access method that allows access between songs without a storage device for storing TOC data.
発明の構成
本発明は、光学式デイスクに入つているアドレ
ス情報の任意の曲頭からの位置データと１曲目か
らの絶対位置データを計算することにより得られ
たアクセスデータをもとにアクセスすることを特
徴とするものである。Structure of the Invention The present invention provides access based on access data obtained by calculating position data from the beginning of an arbitrary song and absolute position data from the first song in address information stored in an optical disk. It is characterized by:
実施例の説明
図に本発明のアクセス方法を示す。今、アクセ
スしようとしている曲間が現在位置の絶対位置デ
ータ（あらかじめコンパクトデイスクに記録され
ている１曲目からの絶対位置データ）と比較して
どの方向にあるかを検出する。次にトラツクジヤ
ンプをくり返し、目的の曲にアクセスする。目的
の曲にアクセスできれば、コンパクトデイスクの
アドレス情報から現在位置が目的曲のどの位置に
あるかがわかる。従つて、あらかじめコンパクト
デイスクに記録されている現在位置の絶対位置デ
ータからこのデータを減算すると、目的曲間の絶
対位置がわかり、この絶対位置データにより曲間
へアクセスできる。これを具体例を上げて説明す
る。図に示すように10曲目の曲間にアクセスする
場合を考える。トラツクジヤンプをくり返して10
曲のＡ点にアクセスしたとする。この時、現在位
置に絶対位置データが22分12秒であり、曲中位置
データが２分05秒であつたとすると、目的曲間位
置Ｐの絶対位置データは22分12秒から２分05秒を
引き、20分07秒であることがわかる。従つて、こ
の目的曲間の絶対位置データがわかれば、容易に
アクセスすることが可能になる。DESCRIPTION OF EMBODIMENTS The access method of the present invention is shown in the figure. It is detected in which direction the gap between the songs to be accessed is compared with the absolute position data of the current position (absolute position data from the first song recorded in advance on the compact disc). Next, repeat the track jump to access the desired song. If you can access the desired song, you can find out where your current position is in the desired song from the address information on the compact disc. Therefore, by subtracting this data from the absolute position data of the current position recorded in advance on the compact disc, the absolute position between the target songs can be found, and it is possible to access between the songs using this absolute position data. This will be explained using a specific example. Consider the case of accessing between the 10th songs as shown in the figure. Repeat track jump 10 times
Suppose that point A of the song is accessed. At this time, if the absolute position data of the current position is 22 minutes 12 seconds and the mid-song position data is 2 minutes 05 seconds, then the absolute position data of the target inter-song position P is 2 minutes 05 seconds from 22 minutes 12 seconds. Subtract and find that it is 20 minutes 07 seconds. Therefore, if the absolute position data between the target songs is known, it becomes possible to access them easily.
発明の効果
以上のように本発明によれば、全てのTOCデ
ータを記憶しておく記憶装置なしで目的曲間へア
クセスするためのデータを得ることができ、もつ
て構成を簡素化することができる。Effects of the Invention As described above, according to the present invention, it is possible to obtain data for accessing between target songs without the need for a storage device that stores all TOC data, thereby simplifying the configuration. can.
図は本発明のアクセス方法を説明するための図
である。
Ａ……現在位置、Ｐ……目的位置。
The figure is a diagram for explaining the access method of the present invention. A... Current position, P... Target position.
Claims (1)
意の曲頭からの位置データと前記光学式デイスク
に記録されている１曲目からの絶対位置データと
を比較して計算することによりアクセス方向デー
タと目的とするアクセス位置としての絶対位置デ
ータを得、これらのアクセスデータを基にしてア
クセスすることを特徴とする光学式デイスクプレ
ーヤのアクセス方法。1. Access direction data and purpose are calculated by comparing position data from the beginning of an arbitrary track included in the address information of the optical disc and absolute position data from the first track recorded on the optical disc. 1. An access method for an optical disc player, characterized in that absolute position data is obtained as an access position to be accessed, and access is performed based on this access data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59100995A JPS60246078A (en) | 1984-05-18 | 1984-05-18 | How to access an optical disc player |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP59100995A JPS60246078A (en) | 1984-05-18 | 1984-05-18 | How to access an optical disc player |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS60246078A JPS60246078A (en) | 1985-12-05 |
| JPH0560190B2 true JPH0560190B2 (en) | 1993-09-01 |
Family
ID=14288881
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP59100995A Granted JPS60246078A (en) | 1984-05-18 | 1984-05-18 | How to access an optical disc player |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS60246078A (en) |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0756746B2 (en) * | 1985-03-29 | 1995-06-14 | ソニー株式会社 | A method of creating a list of recorded data in a write-once optical disc |
| JPH02101395U (en) * | 1989-01-31 | 1990-08-13 |
-
1984
- 1984-05-18 JP JP59100995A patent/JPS60246078A/en active Granted
Also Published As
| Publication number | Publication date |
|---|---|
| JPS60246078A (en) | 1985-12-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| EXPY | Cancellation because of completion of term |